Battery charger



FIG. 1 is a front perspective view of my new design for a battery charger shown in a closed configuration;

FIG. 2 is a front perspective view thereof shown in an open configuration;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a back elevation view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a right side elevation view thereof; and,

FIG. 8 is a left side elevation view thereof. 

CLAIM I claim the ornamental design for a battery charger, as shown and described. 